A black teen was fatally shot by an officer on Tuesday night just two miles from Ferguson, Missouri, police said.

Antonio Martin, 18, who police say pointed a gun at the officer, was shot late Tuesday night at a Mobil gas station in Berkeley, Missouri, the St. Louis Post-Dispatch reports. The alleged victim's mother, Toni Martin, confirmed to the Post-Dispatch that her son had been shot by police.

County police spokesman Sgt. Brian Schellman says a Berkeley police officer was conducting a routine business check at a gas station around 11:15 p.m. Tuesday when he saw two men and approached them.

Schellman says one of the men pulled a handgun and pointed it at the officer. The officer fired several shots, striking and fatally wounding the man. Schellman says that the second person fled and that the deceased man's handgun has been recovered.

The St. Louis County Police released some video footage Wednesday from the gas station's security cameras of the police officer arriving on the scene and the movements leading up to the shooting:

The police officer had been assigned a body camera but wasn't wearing it at the time of the incident, St. Louis County Police Chief Jon Belmar said in a news conference Wednesday morning.

This post has been updated to include security camera footage and to note the officer wasn't wearing a body camera.

CORRECTION:A previous version of this story included an interview with a man claiming to have been at the scene of the shooting and friends with the deceased. As police have released statements saying the second person involved in the incident has fled the scene, the source is now suggesting he was never there.

Swat team members secure the scene near Sparks Middle School in Sparks, Nev., after a shooting there on Monday, Oct. 21, 2013. Authorities are reporting that two people were killed and two wounded at the Nevada middle school. (AP Photo/Kevin Clifford)